The Little Black Dress is timeless and trustworthy — just like your best friend. Here, real-life pals show off the season's most flattering LBDs.

Jamie and Tara

Jamie and Tara

They met two years ago on the job, but you'd swear Jamie and Tara went back decades. They're in contact 24/7 (even on vacation), much to their guys' dismay. Favorite pastime: snacking on pretzel M&M's, then hitting a Zumba class.

From Left: This shoulder-showcasing number from Hannah Joe ($262, hannahjoe.com) is lavished with tiny tucks, rippling ruffles, and a smattering of sparkle — perfect for boosting a boyish build. A knockout whatever your size or shape, this body-skimming, streamlined scoop-neck from Avenue ($80, avenue.com) gets amped up with holiday-happy sequins.

Francesca, Marianne, and Ronnie

Francesca, Marianne, and Ronnie

Careers in design originally brought this trio together, but now their relationship goes way beyond work. Through a challenging year — they've endured everything from downsizing to divorce — the fun-loving group have kept their spirits (and hemlines) high. "The unconditional support we give each other, via cards or over coffee, means a lot," says Francesca.